1977 was the Queen's Silver Jubilee when she celebrated 25 years on the throne.
The Queen lit a huge bonfire on top of a hill in Windsor. This started a chain of bonfires on hilltops all around Britain.
Many people held local street parties where the community all got together to celebrate.
In the 70s bosses and their workers were often arguing and there were many strikes. The Jubilee was a chance for some people to forget about that for a while.